1#   This program is free software: you can redistribute it and/or modify
2#   it under the terms of the GNU General Public License as published by
3#   the Free Software Foundation, either version 3 of the License, or
4#   (at your option) any later version.
5#
6#   This program is distributed in the hope that it will be useful,
7#   but WITHOUT ANY WARRANTY; without even the implied warranty of
8#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9#   GNU General Public License for more details.
10#
11#   You should have received a copy of the GNU General Public License
12#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
13#
14# expansions involving patterns
15var='[hello'
16echo "${var//[/}"
17
18red='\[\e[0;31m\]'
19printf "%s\n" "${red//\\[\\e/}"
20
21foo="${red//\\[\\e/}"
22
23# foo == [0;31m\]
24printf "%s\n" "${foo//[0;31m\\/}"
25
26echo "${var//[]/}"
27echo "${red//[]/}"
28
29v=hello
30foo='[:alpha:]'
31
32echo ${v//[[:alpha:]]/}
33echo ${v//[[:alpha]]/}
34echo ${v//[[:alpha]/}
35